Cellular Extensions Transport Vesicles of Scabrous that Controls

Cellular Extensions Transport Vesicles of Scabrous that Controls Ommatidial Rotation in the Drosophila Compoun Eye (Developmental Cell, in press)


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- Date/Time : Wed October 16., 2002


             14:00-15:00 

- Speaker : Dr. Cheng-Ting Chien


            - Associate Research Fellow


              Institute of Molecular Biology


              Academia Sinica

- Place : Life Science Bldg. #104

- For inquires : Professor Sung Key Jang Dept. of Life Science


               생명과학과 장승기 교수 (☎279-2298)

- Abstract


  Establishment of planar polarity in the Drosophila compound eye requires precise 90o rotation of the ommatidial clusters during development. We found that the morphogenetic furrow controls the stop of ommatidial rotation at 90  by emitting signals to posterior ommatidial clusters. One such signal, Scabrous, is synthesized in the furrow cells and transported in vesicles to ommatidial row 6~8. Scabrous vesicles are transported through novel actin-based cellular extensions, but not transcytosis. Scabrous functions non-autonomously to control the stop of ommatidial rotation by suppressing nemo activity in the second 45  rotation. We propose that the morphogenetic furrow regulates precise ommatidial rotation by transporting Scabrous and perhaps other factors through actin-based cellular extensions.